Non-Interest Revenue and Expense Detail (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Details Of Certain Statements Of Income Lines Details [Abstract]
Professional services	$ 2,750	$ 3,008	$ 3,102
Occupancy and equipment	1,854	1,807	1,904
Goodwill and long-lived asset impairment	384
Card-related fraud losses	308	369	278
Communications	345	383	379
Gain on business travel joint venture transaction		(630)
Other	1,152	1,152	1,133
Total Other, net	$ 6,793	$ 6,089	$ 6,796